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franz / analog multimode filter with lfo and cp3 mixer / 10 HP

Experience the ultimate sonic bliss with this filter featuring a smooth, buttery tone that wraps your sound in warmth. The integrated LFO adds rhythmic pulsations, while the CP3 mixer ensures seamless blending of your audio sources.

key features

  • Analog OTA Filter

  • 4 Filter Outputs: Low Pass, High Pass, Band Pass, Notch

  • Internal LFO with two Waveforms: Triangle & Square

  • LFO Reset,LED indicating LFO rate, LFO normalized to Filter ircuit

  • Apply two LFO waveforms at the same time

  • Attenuator for each LFO Wave or external CV

  • 3-Channel Transistor based Mixer

  • MIX out to use the Filter as a single Mixer Block

  • Volume control for each Mixer Channel

  • Wrong Polarity Protection


specs & downloads

  • width: 10 HP

  • depth: 38 mm

  • power: 83 mA @ +12V / 72 mA @ -12V


documentation

videos
description / manual

The filter is based on the CA3080 chip and offers four different outputs:


  • Low Pass

  • High Pass

  • Band Pass

  • Notch


Tweak the dedicated knobs to finely tune the CUTOFF frequency and RESONANCE according to your preferences. This versatile module not only features a filter circuit but also houses a resettable LFO, offering both TRIANGLE and SQUARE waveforms. The LFO is internally linked to the Filter CUTOFF, modifiable using the CV1/TRI and SQU/CV2 knobs. These waveforms can be simultaneously utilized and reset via an external trigger.


The automatic normalization of each LFO waveform disengages upon connecting an external CV source to the CV1 or CV2 input jacks. Adjust the LFO Rate using the designated potentiometer, with its speed indicated by a dual-colored LED.


For waveform layering, a transistor-based 3-channel mixer is conveniently situated at the module's base. The mixer's sum directly feeds into the filter and is also routed to the MIX output jack. Precisely control input volumes per channel (VOL1-3) and collectively adjust them along with the filter INPUT potentiometer.